Code 2- Enter the initial screen. To play as Sal DiVito, type in "SAL", but do not enter in the "L". Hold L, R, Start, then X. To play as Jamie Rivett, type in "RJR", but do not not enter in the last "R". Hold L, R, Start, then X. Both of these people helped to develop NBA Jam.
Code 3- Enter the initial screen. To play as Air Dog, type "AIR", but do not enter in thr "R". Hold L, R, Start, then X. To play as Chow Chow, type in "CAR", but do not enter in the "R". To play as Scraff, type n "ROD", but do not enter in the "D". Hold L, R, Start, then X.
Code 4- To have unlimited turbo, start a new game entering any initials you like. Select any team, then press Start. When the "Tonight's Matchup" Screen appears, press "B" seven times, then hold Y, A, and B. Keep holding the buttons and release them at tip-off. If the code worked, "Power Up Turbo" will appear at the bottom-left corner.
